Core compound.



' one-quarter nniirnn e rarns earner onrren SOLOMON HALEY, O1 LOS ANGELES, CALIFORNIA.

' cone ooiuronnn.

To all whom it may concern:

Be it'knownthat l, SOLOMON HALEY, a citizen of the "United. States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented or discovered certain new and useful 1m rove ments in Core Compounds, of which t e following is a specification, reference being had thereinto the accompanying drawings.

This invention relates to a compound to be used as a binder or adhesive in the manufacture of sand cores for foundry purposes.

Cores for use in metal founding are almost universally constructed of sand held together by a suitable binder or adhesive, and for the latter linseed oil is now generally used, this material having been found to be by far the most satisfactory of any hereto fore discovered or devised for the purpose stated. A great objection to the use of linseed oil, however, is the relatively high cost of this material, and numerous attem ts have therefore been made to employ other and less expensive substances as adhesive agents, but these substances have generally proved unsatisfactory on account of their chemical or physical action on the molten metal,their failure to bind together the sand of the core with sufficient rigidity, or their objectionable chemical changes when subjected to heat, either in the baking of the core or the subsequent operation of casting.

The object, therefore, of my invention is to provide a substance or compound for-use in the manufacture of cores which shall have all the roperties and advantages of linseed oil for t e purpose stated, but which will be less ex ensive of production.

To t is end In improved binder or adhesive is preferab y compounded in substantially the following manner and of the following ingredients in substantially the proortions stated :-To one gallon of water. is added one half pound of rosin and one quar-' ter pound of glue, preferabl fish glue. The mixture is well boiled, an thereafter, and while said mixture is still hot, is added to the same one half pound of dextrin and about ound of lye, caustic-soda, or other siiitab e alkali, (preferably causticsoda) the exact amount of said last-named ingredient being dependent upon the rela- Specification of Letters Patent. Application filed May is, race. Serial No. 433,657.

Fatented Nov. 3, 1908.

tively acid or basic (properties of the other ingredients employe sufiicient being =used to give to the whole a substantially neutral reaction. The foregoing ingredients are now thoroughly stirred and then. allowed to stand for about twenty-four hours, when the adhesive or artificial oil is ready for use.

In use I preferably mix one part of the compound above described with about fifteen or sixteen parts of sand, which may then be molded into cores and baked in the usual manner.

The foregoing compound has been found to possess substantially the same properties and advantages as, or being slightly superior to, linseed oil for the urpose stated, producing firm, hard cores avlng no injurious effects upon the metal in the process of casting, and costing, in its production, considerably less than the cost of linseed oil.

Having thus described my invention, I claim as new and desire to secure by Letters Patent y 1. A core compound comprising water, rosin, glue, dextrin, and a suitable alkali, substantially in the proportions stated.

2. A core compound, comprising water, rosin, glue, dextrin, and caustic-soda, substantially in the proportions stated.

3. A core com ound containing rosin, glue, and a suitable a1 ali, substantially in the proportions stated. 1

4. A core compound containing rosin, glue,

and caustic-soda, substantially in the proportions stated. 1

5. A core compound containing rosin, dextrin, and a suitable alkali, substantially in the proportions stated.

6. A core compound containing rosin, dextrin, and caustic-soda, substantially in the proportions stated.

7. A corecompound comprising a suitable liquid base containing rosin, lue, dextrin, and a suitable alkali,- substantia ly in the proportions stated.

In testimony whereof I-aflix my signature, in presence of two Witnesses.

, SOLOMON HALEY. Witnesses:

MARY C. HALEY, SANDY Bacon. 

